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Jittery footage in export using 720p60 at 23.98fps in FCP
So I’m outputing a feature film length timeline from FCP 6 to send to studio for post work. The problem I’m having is that some of the movie gets jittery frame issues…not sure if they are dropped frames or what is going on…it was shot on a panasonic HVX200 at 720p60 at a frame rate of 23.98. And so my sequence settings match this (the compressor is set at 720p60 with the editing timebase at 23.98). So I use export to quicktime conversion and my settings are at ‘current’ with ‘key frames’ at 24fps…my compression type is H.264 and ‘Data Rate’ is automatic…So ‘current’ would be 24fps since that’s what my sequence is?? I just don’t know why I would have these little occasional jittery moments in my footage? Could it be that my quicktime player just can’t handle the file? the size of it? I actually did change the frame rate to 60fps with ‘key frames’ to automatic and the jitter issues seemed to be gone while still retaining the filmic 24fps look…which is what I want. It seems however that it would be best to try and get the output to match whatever settings the sequence is..which would be the ‘current’ frame rate settings…Has anyone else had these same issues?? Am I maybe doing something else wrong? Or should I just go with the 60fps?
Thanks!
David -
2 Replies
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Great, thanks for the info Dave! I think I understand that pretty well…although it was actually the DP’s camera so…are you saying then to change the fps to 59.94 in the QuickTime conversion window? Instead of 60 like I did? I actually exported the entire film last night at 60 and it looks pretty darn smooth..with the 24fps look still there of course…I put it at 60 obviously to match the compression of 720p60
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Dave, in FCP, there actually isn’t a frame rate column but a Vid Rate column with the Compressor column right next to it. And as I said in my first post, the Vid Rate is in fact 23.98fps with the compressor being DVCPRO HD 720p60…HOWEVER, there are some clips that the camera man had the Vid Rate at 59.94fps…but the VAST majority of the shots were done at 23.98fps…but maybe it’s just these few clips at 59.94 on my timeline that is making the jittery, frame drop stuff happen every once in a while…because I’ve noticed it’s not at the exact same shots everytime…it’s a kind of general jittery stuff every once in a while…maybe every minute or two.
My biggest issue for now anyway, is that I REALLY have to get this reference video of the finished film off to the studio so they can do the sound FX and final mix…so I need to get something to them NOW…and I think I can still send them a less than perfect video (that still has some of the jitter stuff happening) as the time code in relation to the video will still be synced properly?? Isn’t this correct?
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